Six Syrian refugees arrested in Germany on suspicion of planning a terrorist attack on behalf of Islamic State (IS, formerly ISIS) were freed on Wednesday due to a lack of evidence, AFP reports. The suspects, aged 20 to 28, were detained during dawn raids on Tuesday that saw 500 police officers entering residences in the cities of Kassel, Essen, Hanover and Leipzig. They were believed to have been targeting a Christmas market. However, the Frankfurt public prosecutor said there was “insufficient evidence” that they were preparing an attack or were in any way linked to IS.